| //===--- SourceManager.h - Track and cache source files ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the SourceManager interface. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_SOURCEMANAGER_H |
| #define LLVM_CLANG_SOURCEMANAGER_H |
| |
| #include "clang/Basic/LLVM.h" |
| #include "clang/Basic/SourceLocation.h" |
| #include "llvm/Support/Allocator.h" |
| #include "llvm/Support/DataTypes.h" |
| #include "llvm/ADT/PointerIntPair.h" |
| #include "llvm/ADT/PointerUnion.h" |
| #include "llvm/ADT/IntrusiveRefCntPtr.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include <map> |
| #include <vector> |
| #include <cassert> |
| |
| namespace clang { |
| |
| class Diagnostic; |
| class SourceManager; |
| class FileManager; |
| class FileEntry; |
| class LineTableInfo; |
| class LangOptions; |
| class ASTWriter; |
| class ASTReader; |
| |
| /// SrcMgr - Public enums and private classes that are part of the |
| /// SourceManager implementation. |
| /// |
| namespace SrcMgr { |
| /// CharacteristicKind - This is used to represent whether a file or directory |
| /// holds normal user code, system code, or system code which is implicitly |
| /// 'extern "C"' in C++ mode. Entire directories can be tagged with this |
| /// (this is maintained by DirectoryLookup and friends) as can specific |
| /// FileInfos when a #pragma system_header is seen or various other cases. |
| /// |
| enum CharacteristicKind { |
| C_User, C_System, C_ExternCSystem |
| }; |
| |
| /// ContentCache - One instance of this struct is kept for every file |
| /// loaded or used. This object owns the MemoryBuffer object. |
| class ContentCache { |
| enum CCFlags { |
| /// \brief Whether the buffer is invalid. |
| InvalidFlag = 0x01, |
| /// \brief Whether the buffer should not be freed on destruction. |
| DoNotFreeFlag = 0x02 |
| }; |
| |
| /// Buffer - The actual buffer containing the characters from the input |
| /// file. This is owned by the ContentCache object. |
| /// The bits indicate indicates whether the buffer is invalid. |
| mutable llvm::PointerIntPair<const llvm::MemoryBuffer *, 2> Buffer; |
| |
| public: |
| /// Reference to the file entry representing this ContentCache. |
| /// This reference does not own the FileEntry object. |
| /// It is possible for this to be NULL if |
| /// the ContentCache encapsulates an imaginary text buffer. |
| const FileEntry *OrigEntry; |
| |
| /// \brief References the file which the contents were actually loaded from. |
| /// Can be different from 'Entry' if we overridden the contents of one file |
| /// with the contents of another file. |
| const FileEntry *ContentsEntry; |
| |
| /// SourceLineCache - A bump pointer allocated array of offsets for each |
| /// source line. This is lazily computed. This is owned by the |
| /// SourceManager BumpPointerAllocator object. |
| unsigned *SourceLineCache; |
| |
| /// NumLines - The number of lines in this ContentCache. This is only valid |
| /// if SourceLineCache is non-null. |
| unsigned NumLines; |
| |
| /// \brief Lazily computed map of macro argument chunks to their expanded |
| /// source location. |
| typedef std::map<unsigned, SourceLocation> MacroArgsMap; |
| MacroArgsMap *MacroArgsCache; |
| |
| /// getBuffer - Returns the memory buffer for the associated content. |
| /// |
| /// \param Diag Object through which diagnostics will be emitted if the |
| /// buffer cannot be retrieved. |
| /// |
| /// \param Loc If specified, is the location that invalid file diagnostics |
| /// will be emitted at. |
| /// |
| /// \param Invalid If non-NULL, will be set \c true if an error occurred. |
| const llvm::MemoryBuffer *getBuffer(Diagnostic &Diag, |
| const SourceManager &SM, |
| SourceLocation Loc = SourceLocation(), |
| bool *Invalid = 0) const; |
| |
| /// getSize - Returns the size of the content encapsulated by this |
| /// ContentCache. This can be the size of the source file or the size of an |
| /// arbitrary scratch buffer. If the ContentCache encapsulates a source |
| /// file this size is retrieved from the file's FileEntry. |
| unsigned getSize() const; |
| |
| /// getSizeBytesMapped - Returns the number of bytes actually mapped for |
| /// this ContentCache. This can be 0 if the MemBuffer was not actually |
| /// expanded. |
| unsigned getSizeBytesMapped() const; |
| |
| /// Returns the kind of memory used to back the memory buffer for |
| /// this content cache. This is used for performance analysis. |
| llvm::MemoryBuffer::BufferKind getMemoryBufferKind() const; |
| |
| void setBuffer(const llvm::MemoryBuffer *B) { |
| assert(!Buffer.getPointer() && "MemoryBuffer already set."); |
| Buffer.setPointer(B); |
| Buffer.setInt(false); |
| } |
| |
| /// \brief Get the underlying buffer, returning NULL if the buffer is not |
| /// yet available. |
| const llvm::MemoryBuffer *getRawBuffer() const { |
| return Buffer.getPointer(); |
| } |
| |
| /// \brief Replace the existing buffer (which will be deleted) |
| /// with the given buffer. |
| void replaceBuffer(const llvm::MemoryBuffer *B, bool DoNotFree = false); |
| |
| /// \brief Determine whether the buffer itself is invalid. |
| bool isBufferInvalid() const { |
| return Buffer.getInt() & InvalidFlag; |
| } |
| |
| /// \brief Determine whether the buffer should be freed. |
| bool shouldFreeBuffer() const { |
| return (Buffer.getInt() & DoNotFreeFlag) == 0; |
| } |
| |
| ContentCache(const FileEntry *Ent = 0) |
| : Buffer(0, false), OrigEntry(Ent), ContentsEntry(Ent), |
| SourceLineCache(0), NumLines(0), MacroArgsCache(0) {} |
| |
| ContentCache(const FileEntry *Ent, const FileEntry *contentEnt) |
| : Buffer(0, false), OrigEntry(Ent), ContentsEntry(contentEnt), |
| SourceLineCache(0), NumLines(0), MacroArgsCache(0) {} |
| |
| ~ContentCache(); |
| |
| /// The copy ctor does not allow copies where source object has either |
| /// a non-NULL Buffer or SourceLineCache. Ownership of allocated memory |
| /// is not transferred, so this is a logical error. |
| ContentCache(const ContentCache &RHS) |
| : Buffer(0, false), SourceLineCache(0), MacroArgsCache(0) |
| { |
| OrigEntry = RHS.OrigEntry; |
| ContentsEntry = RHS.ContentsEntry; |
| |
| assert (RHS.Buffer.getPointer() == 0 && RHS.SourceLineCache == 0 && |
| RHS.MacroArgsCache == 0 |
| && "Passed ContentCache object cannot own a buffer."); |
| |
| NumLines = RHS.NumLines; |
| } |
| |
| private: |
| // Disable assignments. |
| ContentCache &operator=(const ContentCache& RHS); |
| }; |
| |
| /// FileInfo - Information about a FileID, basically just the logical file |
| /// that it represents and include stack information. |
| /// |
| /// Each FileInfo has include stack information, indicating where it came |
| /// from. This information encodes the #include chain that a token was |
| /// expanded from. The main include file has an invalid IncludeLoc. |
| /// |
| /// FileInfos contain a "ContentCache *", with the contents of the file. |
| /// |
| class FileInfo { |
| /// IncludeLoc - The location of the #include that brought in this file. |
| /// This is an invalid SLOC for the main file (top of the #include chain). |
| unsigned IncludeLoc; // Really a SourceLocation |
| |
| /// \brief Number of FileIDs (files and macros) that were created during |
| /// preprocessing of this #include, including this SLocEntry. |
| /// Zero means the preprocessor didn't provide such info for this SLocEntry. |
| unsigned NumCreatedFIDs; |
| |
| /// Data - This contains the ContentCache* and the bits indicating the |
| /// characteristic of the file and whether it has #line info, all bitmangled |
| /// together. |
| uintptr_t Data; |
| |
| friend class SourceManager; |
| friend class ASTWriter; |
| friend class ASTReader; |
| public: |
| /// get - Return a FileInfo object. |
| static FileInfo get(SourceLocation IL, const ContentCache *Con, |
| CharacteristicKind FileCharacter) { |
| FileInfo X; |
| X.IncludeLoc = IL.getRawEncoding(); |
| X.NumCreatedFIDs = 0; |
| X.Data = (uintptr_t)Con; |
| assert((X.Data & 7) == 0 &&"ContentCache pointer insufficiently aligned"); |
| assert((unsigned)FileCharacter < 4 && "invalid file character"); |
| X.Data |= (unsigned)FileCharacter; |
| return X; |
| } |
| |
| SourceLocation getIncludeLoc() const { |
| return SourceLocation::getFromRawEncoding(IncludeLoc); |
| } |
| const ContentCache* getContentCache() const { |
| return reinterpret_cast<const ContentCache*>(Data & ~7UL); |
| } |
| |
| /// getCharacteristic - Return whether this is a system header or not. |
| CharacteristicKind getFileCharacteristic() const { |
| return (CharacteristicKind)(Data & 3); |
| } |
| |
| /// hasLineDirectives - Return true if this FileID has #line directives in |
| /// it. |
| bool hasLineDirectives() const { return (Data & 4) != 0; } |
| |
| /// setHasLineDirectives - Set the flag that indicates that this FileID has |
| /// line table entries associated with it. |
| void setHasLineDirectives() { |
| Data |= 4; |
| } |
| }; |
| |
| /// ExpansionInfo - Each ExpansionInfo encodes the expansion location - where |
| /// the token was ultimately expanded, and the SpellingLoc - where the actual |
| /// character data for the token came from. |
| class ExpansionInfo { |
| // Really these are all SourceLocations. |
| |
| /// SpellingLoc - Where the spelling for the token can be found. |
| unsigned SpellingLoc; |
| |
| /// ExpansionLocStart/ExpansionLocEnd - In a macro expansion, these |
| /// indicate the start and end of the expansion. In object-like macros, |
| /// these will be the same. In a function-like macro expansion, the start |
| /// will be the identifier and the end will be the ')'. Finally, in |
| /// macro-argument instantitions, the end will be 'SourceLocation()', an |
| /// invalid location. |
| unsigned ExpansionLocStart, ExpansionLocEnd; |
| |
| public: |
| SourceLocation getSpellingLoc() const { |
| return SourceLocation::getFromRawEncoding(SpellingLoc); |
| } |
| SourceLocation getExpansionLocStart() const { |
| return SourceLocation::getFromRawEncoding(ExpansionLocStart); |
| } |
| SourceLocation getExpansionLocEnd() const { |
| SourceLocation EndLoc = |
| SourceLocation::getFromRawEncoding(ExpansionLocEnd); |
| return EndLoc.isInvalid() ? getExpansionLocStart() : EndLoc; |
| } |
| |
| std::pair<SourceLocation,SourceLocation> getExpansionLocRange() const { |
| return std::make_pair(getExpansionLocStart(), getExpansionLocEnd()); |
| } |
| |
| bool isMacroArgExpansion() const { |
| // Note that this needs to return false for default constructed objects. |
| return getExpansionLocStart().isValid() && |
| SourceLocation::getFromRawEncoding(ExpansionLocEnd).isInvalid(); |
| } |
| |
| /// create - Return a ExpansionInfo for an expansion. Start and End specify |
| /// the expansion range (where the macro is expanded), and SpellingLoc |
| /// specifies the spelling location (where the characters from the token |
| /// come from). All three can refer to normal File SLocs or expansion |
| /// locations. |
| static ExpansionInfo create(SourceLocation SpellingLoc, |
| SourceLocation Start, SourceLocation End) { |
| ExpansionInfo X; |
| X.SpellingLoc = SpellingLoc.getRawEncoding(); |
| X.ExpansionLocStart = Start.getRawEncoding(); |
| X.ExpansionLocEnd = End.getRawEncoding(); |
| return X; |
| } |
| |
| /// createForMacroArg - Return a special ExpansionInfo for the expansion of |
| /// a macro argument into a function-like macro's body. ExpansionLoc |
| /// specifies the expansion location (where the macro is expanded). This |
| /// doesn't need to be a range because a macro is always expanded at |
| /// a macro parameter reference, and macro parameters are always exactly |
| /// one token. SpellingLoc specifies the spelling location (where the |
| /// characters from the token come from). ExpansionLoc and SpellingLoc can |
| /// both refer to normal File SLocs or expansion locations. |
| /// |
| /// Given the code: |
| /// \code |
| /// #define F(x) f(x) |
| /// F(42); |
| /// \endcode |
| /// |
| /// When expanding '\c F(42)', the '\c x' would call this with an |
| /// SpellingLoc pointing at '\c 42' anad an ExpansionLoc pointing at its |
| /// location in the definition of '\c F'. |
| static ExpansionInfo createForMacroArg(SourceLocation SpellingLoc, |
| SourceLocation ExpansionLoc) { |
| // We store an intentionally invalid source location for the end of the |
| // expansion range to mark that this is a macro argument ion rather than |
| // a normal one. |
| return create(SpellingLoc, ExpansionLoc, SourceLocation()); |
| } |
| }; |
| |
| /// SLocEntry - This is a discriminated union of FileInfo and |
| /// ExpansionInfo. SourceManager keeps an array of these objects, and |
| /// they are uniquely identified by the FileID datatype. |
| class SLocEntry { |
| unsigned Offset; // low bit is set for expansion info. |
| union { |
| FileInfo File; |
| ExpansionInfo Expansion; |
| }; |
| public: |
| unsigned getOffset() const { return Offset >> 1; } |
| |
| bool isExpansion() const { return Offset & 1; } |
| bool isFile() const { return !isExpansion(); } |
| |
| const FileInfo &getFile() const { |
| assert(isFile() && "Not a file SLocEntry!"); |
| return File; |
| } |
| |
| const ExpansionInfo &getExpansion() const { |
| assert(isExpansion() && "Not a macro expansion SLocEntry!"); |
| return Expansion; |
| } |
| |
| static SLocEntry get(unsigned Offset, const FileInfo &FI) { |
| SLocEntry E; |
| E.Offset = Offset << 1; |
| E.File = FI; |
| return E; |
| } |
| |
| static SLocEntry get(unsigned Offset, const ExpansionInfo &Expansion) { |
| SLocEntry E; |
| E.Offset = (Offset << 1) | 1; |
| E.Expansion = Expansion; |
| return E; |
| } |
| }; |
| } // end SrcMgr namespace. |
| |
| /// \brief External source of source location entries. |
| class ExternalSLocEntrySource { |
| public: |
| virtual ~ExternalSLocEntrySource(); |
| |
| /// \brief Read the source location entry with index ID, which will always be |
| /// less than -1. |
| /// |
| /// \returns true if an error occurred that prevented the source-location |
| /// entry from being loaded. |
| virtual bool ReadSLocEntry(int ID) = 0; |
| }; |
| |
| |
| /// IsBeforeInTranslationUnitCache - This class holds the cache used by |
| /// isBeforeInTranslationUnit. The cache structure is complex enough to be |
| /// worth breaking out of SourceManager. |
| class IsBeforeInTranslationUnitCache { |
| /// L/R QueryFID - These are the FID's of the cached query. If these match up |
| /// with a subsequent query, the result can be reused. |
| FileID LQueryFID, RQueryFID; |
| |
| /// \brief True if LQueryFID was created before RQueryFID. This is used |
| /// to compare macro expansion locations. |
| bool IsLQFIDBeforeRQFID; |
| |
| /// CommonFID - This is the file found in common between the two #include |
| /// traces. It is the nearest common ancestor of the #include tree. |
| FileID CommonFID; |
| |
| /// L/R CommonOffset - This is the offset of the previous query in CommonFID. |
| /// Usually, this represents the location of the #include for QueryFID, but if |
| /// LQueryFID is a parent of RQueryFID (or vise versa) then these can be a |
| /// random token in the parent. |
| unsigned LCommonOffset, RCommonOffset; |
| public: |
| |
| /// isCacheValid - Return true if the currently cached values match up with |
| /// the specified LHS/RHS query. If not, we can't use the cache. |
| bool isCacheValid(FileID LHS, FileID RHS) const { |
| return LQueryFID == LHS && RQueryFID == RHS; |
| } |
| |
| /// getCachedResult - If the cache is valid, compute the result given the |
| /// specified offsets in the LHS/RHS FID's. |
| bool getCachedResult(unsigned LOffset, unsigned ROffset) const { |
| // If one of the query files is the common file, use the offset. Otherwise, |
| // use the #include loc in the common file. |
| if (LQueryFID != CommonFID) LOffset = LCommonOffset; |
| if (RQueryFID != CommonFID) ROffset = RCommonOffset; |
| |
| // It is common for multiple macro expansions to be "included" from the same |
| // location (expansion location), in which case use the order of the FileIDs |
| // to determine which came first. |
| if (LOffset == ROffset && LQueryFID != CommonFID && RQueryFID != CommonFID) |
| return IsLQFIDBeforeRQFID; |
| |
| return LOffset < ROffset; |
| } |
| |
| // Set up a new query. |
| void setQueryFIDs(FileID LHS, FileID RHS, bool isLFIDBeforeRFID) { |
| assert(LHS != RHS); |
| LQueryFID = LHS; |
| RQueryFID = RHS; |
| IsLQFIDBeforeRQFID = isLFIDBeforeRFID; |
| } |
| |
| void clear() { |
| LQueryFID = RQueryFID = FileID(); |
| IsLQFIDBeforeRQFID = false; |
| } |
| |
| void setCommonLoc(FileID commonFID, unsigned lCommonOffset, |
| unsigned rCommonOffset) { |
| CommonFID = commonFID; |
| LCommonOffset = lCommonOffset; |
| RCommonOffset = rCommonOffset; |
| } |
| |
| }; |
| |
| /// \brief This class handles loading and caching of source files into memory. |
| /// |
| /// This object owns the MemoryBuffer objects for all of the loaded |
| /// files and assigns unique FileID's for each unique #include chain. |
| /// |
| /// The SourceManager can be queried for information about SourceLocation |
| /// objects, turning them into either spelling or expansion locations. Spelling |
| /// locations represent where the bytes corresponding to a token came from and |
| /// expansion locations represent where the location is in the user's view. In |
| /// the case of a macro expansion, for example, the spelling location indicates |
| /// where the expanded token came from and the expansion location specifies |
| /// where it was expanded. |
| class SourceManager : public llvm::RefCountedBase<SourceManager> { |
| /// \brief Diagnostic object. |
| Diagnostic &Diag; |
| |
| FileManager &FileMgr; |
| |
| mutable llvm::BumpPtrAllocator ContentCacheAlloc; |
| |
| /// FileInfos - Memoized information about all of the files tracked by this |
| /// SourceManager. This set allows us to merge ContentCache entries based |
| /// on their FileEntry*. All ContentCache objects will thus have unique, |
| /// non-null, FileEntry pointers. |
| llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*> FileInfos; |
| |
| /// \brief True if the ContentCache for files that are overriden by other |
| /// files, should report the original file name. Defaults to true. |
| bool OverridenFilesKeepOriginalName; |
| |
| /// \brief Files that have been overriden with the contents from another file. |
| llvm::DenseMap<const FileEntry *, const FileEntry *> OverriddenFiles; |
| |
| /// MemBufferInfos - Information about various memory buffers that we have |
| /// read in. All FileEntry* within the stored ContentCache objects are NULL, |
| /// as they do not refer to a file. |
| std::vector<SrcMgr::ContentCache*> MemBufferInfos; |
| |
| /// \brief The table of SLocEntries that are local to this module. |
| /// |
| /// Positive FileIDs are indexes into this table. Entry 0 indicates an invalid |
| /// expansion. |
| std::vector<SrcMgr::SLocEntry> LocalSLocEntryTable; |
| |
| /// \brief The table of SLocEntries that are loaded from other modules. |
| /// |
| /// Negative FileIDs are indexes into this table. To get from ID to an index, |
| /// use (-ID - 2). |
| std::vector<SrcMgr::SLocEntry> LoadedSLocEntryTable; |
| |
| /// \brief The starting offset of the next local SLocEntry. |
| /// |
| /// This is LocalSLocEntryTable.back().Offset + the size of that entry. |
| unsigned NextLocalOffset; |
| |
| /// \brief The starting offset of the latest batch of loaded SLocEntries. |
| /// |
| /// This is LoadedSLocEntryTable.back().Offset, except that that entry might |
| /// not have been loaded, so that value would be unknown. |
| unsigned CurrentLoadedOffset; |
| |
| /// \brief The highest possible offset is 2^31-1, so CurrentLoadedOffset |
| /// starts at 2^31. |
| static const unsigned MaxLoadedOffset = 1U << 31U; |
| |
| /// \brief A bitmap that indicates whether the entries of LoadedSLocEntryTable |
| /// have already been loaded from the external source. |
| /// |
| /// Same indexing as LoadedSLocEntryTable. |
| std::vector<bool> SLocEntryLoaded; |
| |
| /// \brief An external source for source location entries. |
| ExternalSLocEntrySource *ExternalSLocEntries; |
| |
| /// LastFileIDLookup - This is a one-entry cache to speed up getFileID. |
| /// LastFileIDLookup records the last FileID looked up or created, because it |
| /// is very common to look up many tokens from the same file. |
| mutable FileID LastFileIDLookup; |
| |
| /// LineTable - This holds information for #line directives. It is referenced |
| /// by indices from SLocEntryTable. |
| LineTableInfo *LineTable; |
| |
| /// LastLineNo - These ivars serve as a cache used in the getLineNumber |
| /// method which is used to speedup getLineNumber calls to nearby locations. |
| mutable FileID LastLineNoFileIDQuery; |
| mutable SrcMgr::ContentCache *LastLineNoContentCache; |
| mutable unsigned LastLineNoFilePos; |
| mutable unsigned LastLineNoResult; |
| |
| /// MainFileID - The file ID for the main source file of the translation unit. |
| FileID MainFileID; |
| |
| // Statistics for -print-stats. |
| mutable unsigned NumLinearScans, NumBinaryProbes; |
| |
| // Cache results for the isBeforeInTranslationUnit method. |
| mutable IsBeforeInTranslationUnitCache IsBeforeInTUCache; |
| |
| // Cache for the "fake" buffer used for error-recovery purposes. |
| mutable llvm::MemoryBuffer *FakeBufferForRecovery; |
| |
| // SourceManager doesn't support copy construction. |
| explicit SourceManager(const SourceManager&); |
| void operator=(const SourceManager&); |
| public: |
| SourceManager(Diagnostic &Diag, FileManager &FileMgr); |
| ~SourceManager(); |
| |
| void clearIDTables(); |
| |
| Diagnostic &getDiagnostics() const { return Diag; } |
| |
| FileManager &getFileManager() const { return FileMgr; } |
| |
| /// \brief Set true if the SourceManager should report the original file name |
| /// for contents of files that were overriden by other files.Defaults to true. |
| void setOverridenFilesKeepOriginalName(bool value) { |
| OverridenFilesKeepOriginalName = value; |
| } |
| |
| /// createMainFileIDForMembuffer - Create the FileID for a memory buffer |
| /// that will represent the FileID for the main source. One example |
| /// of when this would be used is when the main source is read from STDIN. |
| FileID createMainFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) { |
| assert(MainFileID.isInvalid() && "MainFileID already set!"); |
| MainFileID = createFileIDForMemBuffer(Buffer); |
| return MainFileID; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // MainFileID creation and querying methods. |
| //===--------------------------------------------------------------------===// |
| |
| /// getMainFileID - Returns the FileID of the main source file. |
| FileID getMainFileID() const { return MainFileID; } |
| |
| /// createMainFileID - Create the FileID for the main source file. |
| FileID createMainFileID(const FileEntry *SourceFile) { |
| assert(MainFileID.isInvalid() && "MainFileID already set!"); |
| MainFileID = createFileID(SourceFile, SourceLocation(), SrcMgr::C_User); |
| return MainFileID; |
| } |
| |
| /// \brief Set the file ID for the precompiled preamble, which is also the |
| /// main file. |
| void SetPreambleFileID(FileID Preamble) { |
| assert(MainFileID.isInvalid() && "MainFileID already set!"); |
| MainFileID = Preamble; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Methods to create new FileID's and macro expansions. |
| //===--------------------------------------------------------------------===// |
| |
| /// createFileID - Create a new FileID that represents the specified file |
| /// being #included from the specified IncludePosition. This translates NULL |
| /// into standard input. |
| FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, |
| SrcMgr::CharacteristicKind FileCharacter, |
| int LoadedID = 0, unsigned LoadedOffset = 0) { |
| const SrcMgr::ContentCache *IR = getOrCreateContentCache(SourceFile); |
| assert(IR && "getOrCreateContentCache() cannot return NULL"); |
| return createFileID(IR, IncludePos, FileCharacter, LoadedID, LoadedOffset); |
| } |
| |
| /// createFileIDForMemBuffer - Create a new FileID that represents the |
| /// specified memory buffer. This does no caching of the buffer and takes |
| /// ownership of the MemoryBuffer, so only pass a MemoryBuffer to this once. |
| FileID createFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer, |
| int LoadedID = 0, unsigned LoadedOffset = 0) { |
| return createFileID(createMemBufferContentCache(Buffer), SourceLocation(), |
| SrcMgr::C_User, LoadedID, LoadedOffset); |
| } |
| |
| /// createMacroArgExpansionLoc - Return a new SourceLocation that encodes the |
| /// fact that a token from SpellingLoc should actually be referenced from |
| /// ExpansionLoc, and that it represents the expansion of a macro argument |
| /// into the function-like macro body. |
| SourceLocation createMacroArgExpansionLoc(SourceLocation Loc, |
| SourceLocation ExpansionLoc, |
| unsigned TokLength); |
| |
| /// createExpansionLoc - Return a new SourceLocation that encodes the fact |
| /// that a token from SpellingLoc should actually be referenced from |
| /// ExpansionLoc. |
| SourceLocation createExpansionLoc(SourceLocation Loc, |
| SourceLocation ExpansionLocStart, |
| SourceLocation ExpansionLocEnd, |
| unsigned TokLength, |
| int LoadedID = 0, |
| unsigned LoadedOffset = 0); |
| |
| /// \brief Retrieve the memory buffer associated with the given file. |
| /// |
| /// \param Invalid If non-NULL, will be set \c true if an error |
| /// occurs while retrieving the memory buffer. |
| const llvm::MemoryBuffer *getMemoryBufferForFile(const FileEntry *File, |
| bool *Invalid = 0); |
| |
| /// \brief Override the contents of the given source file by providing an |
| /// already-allocated buffer. |
| /// |
| /// \param SourceFile the source file whose contents will be overriden. |
| /// |
| /// \param Buffer the memory buffer whose contents will be used as the |
| /// data in the given source file. |
| /// |
| /// \param DoNotFree If true, then the buffer will not be freed when the |
| /// source manager is destroyed. |
| void overrideFileContents(const FileEntry *SourceFile, |
| const llvm::MemoryBuffer *Buffer, |
| bool DoNotFree = false); |
| |
| /// \brief Override the the given source file with another one. |
| /// |
| /// \param SourceFile the source file which will be overriden. |
| /// |
| /// \param NewFile the file whose contents will be used as the |
| /// data instead of the contents of the given source file. |
| void overrideFileContents(const FileEntry *SourceFile, |
| const FileEntry *NewFile); |
| |
| //===--------------------------------------------------------------------===// |
| // FileID manipulation methods. |
| //===--------------------------------------------------------------------===// |
| |
| /// getBuffer - Return the buffer for the specified FileID. If there is an |
| /// error opening this buffer the first time, this manufactures a temporary |
| /// buffer and returns a non-empty error string. |
| const llvm::MemoryBuffer *getBuffer(FileID FID, SourceLocation Loc, |
| bool *Invalid = 0) const { |
| bool MyInvalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid); |
| if (MyInvalid || !Entry.isFile()) { |
| if (Invalid) |
| *Invalid = true; |
| |
| return getFakeBufferForRecovery(); |
| } |
| |
| return Entry.getFile().getContentCache()->getBuffer(Diag, *this, Loc, |
| Invalid); |
| } |
| |
| const llvm::MemoryBuffer *getBuffer(FileID FID, bool *Invalid = 0) const { |
| bool MyInvalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid); |
| if (MyInvalid || !Entry.isFile()) { |
| if (Invalid) |
| *Invalid = true; |
| |
| return getFakeBufferForRecovery(); |
| } |
| |
| return Entry.getFile().getContentCache()->getBuffer(Diag, *this, |
| SourceLocation(), |
| Invalid); |
| } |
| |
| /// getFileEntryForID - Returns the FileEntry record for the provided FileID. |
| const FileEntry *getFileEntryForID(FileID FID) const { |
| bool MyInvalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid); |
| if (MyInvalid || !Entry.isFile()) |
| return 0; |
| |
| return Entry.getFile().getContentCache()->OrigEntry; |
| } |
| |
| /// Returns the FileEntry record for the provided SLocEntry. |
| const FileEntry *getFileEntryForSLocEntry(const SrcMgr::SLocEntry &sloc) const |
| { |
| return sloc.getFile().getContentCache()->OrigEntry; |
| } |
| |
| /// getBufferData - Return a StringRef to the source buffer data for the |
| /// specified FileID. |
| /// |
| /// \param FID The file ID whose contents will be returned. |
| /// \param Invalid If non-NULL, will be set true if an error occurred. |
| StringRef getBufferData(FileID FID, bool *Invalid = 0) const; |
| |
| /// \brief Get the number of FileIDs (files and macros) that were created |
| /// during preprocessing of \arg FID, including it. |
| unsigned getNumCreatedFIDsForFileID(FileID FID) const { |
| bool Invalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid); |
| if (Invalid || !Entry.isFile()) |
| return 0; |
| |
| return Entry.getFile().NumCreatedFIDs; |
| } |
| |
| /// \brief Set the number of FileIDs (files and macros) that were created |
| /// during preprocessing of \arg FID, including it. |
| void setNumCreatedFIDsForFileID(FileID FID, unsigned NumFIDs) const { |
| bool Invalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid); |
| if (Invalid || !Entry.isFile()) |
| return; |
| |
| assert(Entry.getFile().NumCreatedFIDs == 0 && "Already set!"); |
| const_cast<SrcMgr::FileInfo &>(Entry.getFile()).NumCreatedFIDs = NumFIDs; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // SourceLocation manipulation methods. |
| //===--------------------------------------------------------------------===// |
| |
| /// getFileID - Return the FileID for a SourceLocation. This is a very |
| /// hot method that is used for all SourceManager queries that start with a |
| /// SourceLocation object. It is responsible for finding the entry in |
| /// SLocEntryTable which contains the specified location. |
| /// |
| FileID getFileID(SourceLocation SpellingLoc) const { |
| unsigned SLocOffset = SpellingLoc.getOffset(); |
| |
| // If our one-entry cache covers this offset, just return it. |
| if (isOffsetInFileID(LastFileIDLookup, SLocOffset)) |
| return LastFileIDLookup; |
| |
| return getFileIDSlow(SLocOffset); |
| } |
| |
| /// getLocForStartOfFile - Return the source location corresponding to the |
| /// first byte of the specified file. |
| SourceLocation getLocForStartOfFile(FileID FID) const { |
| bool Invalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid); |
| if (Invalid || !Entry.isFile()) |
| return SourceLocation(); |
| |
| unsigned FileOffset = Entry.getOffset(); |
| return SourceLocation::getFileLoc(FileOffset); |
| } |
| |
| /// \brief Returns the include location if \arg FID is a #include'd file |
| /// otherwise it returns an invalid location. |
| SourceLocation getIncludeLoc(FileID FID) const { |
| bool Invalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid); |
| if (Invalid || !Entry.isFile()) |
| return SourceLocation(); |
| |
| return Entry.getFile().getIncludeLoc(); |
| } |
| |
| /// getExpansionLoc - Given a SourceLocation object, return the expansion |
| /// location referenced by the ID. |
| SourceLocation getExpansionLoc(SourceLocation Loc) const { |
| // Handle the non-mapped case inline, defer to out of line code to handle |
| // expansions. |
| if (Loc.isFileID()) return Loc; |
| return getExpansionLocSlowCase(Loc); |
| } |
| |
| /// getImmediateExpansionRange - Loc is required to be an expansion location. |
| /// Return the start/end of the expansion information. |
| std::pair<SourceLocation,SourceLocation> |
| getImmediateExpansionRange(SourceLocation Loc) const; |
| |
| /// getExpansionRange - Given a SourceLocation object, return the range of |
| /// tokens covered by the expansion the ultimate file. |
| std::pair<SourceLocation,SourceLocation> |
| getExpansionRange(SourceLocation Loc) const; |
| |
| |
| /// getSpellingLoc - Given a SourceLocation object, return the spelling |
| /// location referenced by the ID. This is the place where the characters |
| /// that make up the lexed token can be found. |
| SourceLocation getSpellingLoc(SourceLocation Loc) const { |
| // Handle the non-mapped case inline, defer to out of line code to handle |
| // expansions. |
| if (Loc.isFileID()) return Loc; |
| return getSpellingLocSlowCase(Loc); |
| } |
| |
| /// getImmediateSpellingLoc - Given a SourceLocation object, return the |
| /// spelling location referenced by the ID. This is the first level down |
| /// towards the place where the characters that make up the lexed token can be |
| /// found. This should not generally be used by clients. |
| SourceLocation getImmediateSpellingLoc(SourceLocation Loc) const; |
| |
| /// getDecomposedLoc - Decompose the specified location into a raw FileID + |
| /// Offset pair. The first element is the FileID, the second is the |
| /// offset from the start of the buffer of the location. |
| std::pair<FileID, unsigned> getDecomposedLoc(SourceLocation Loc) const { |
| FileID FID = getFileID(Loc); |
| return std::make_pair(FID, Loc.getOffset()-getSLocEntry(FID).getOffset()); |
| } |
| |
| /// getDecomposedExpansionLoc - Decompose the specified location into a raw |
| /// FileID + Offset pair. If the location is an expansion record, walk |
| /// through it until we find the final location expanded. |
| std::pair<FileID, unsigned> |
| getDecomposedExpansionLoc(SourceLocation Loc) const { |
| FileID FID = getFileID(Loc); |
| const SrcMgr::SLocEntry *E = &getSLocEntry(FID); |
| |
| unsigned Offset = Loc.getOffset()-E->getOffset(); |
| if (Loc.isFileID()) |
| return std::make_pair(FID, Offset); |
| |
| return getDecomposedExpansionLocSlowCase(E); |
| } |
| |
| /// getDecomposedSpellingLoc - Decompose the specified location into a raw |
| /// FileID + Offset pair. If the location is an expansion record, walk |
| /// through it until we find its spelling record. |
| std::pair<FileID, unsigned> |
| getDecomposedSpellingLoc(SourceLocation Loc) const { |
| FileID FID = getFileID(Loc); |
| const SrcMgr::SLocEntry *E = &getSLocEntry(FID); |
| |
| unsigned Offset = Loc.getOffset()-E->getOffset(); |
| if (Loc.isFileID()) |
| return std::make_pair(FID, Offset); |
| return getDecomposedSpellingLocSlowCase(E, Offset); |
| } |
| |
| /// getFileOffset - This method returns the offset from the start |
| /// of the file that the specified SourceLocation represents. This is not very |
| /// meaningful for a macro ID. |
| unsigned getFileOffset(SourceLocation SpellingLoc) const { |
| return getDecomposedLoc(SpellingLoc).second; |
| } |
| |
| /// isMacroArgExpansion - This method tests whether the given source location |
| /// represents a macro argument's expansion into the function-like macro |
| /// definition. Such source locations only appear inside of the expansion |
| /// locations representing where a particular function-like macro was |
| /// expanded. |
| bool isMacroArgExpansion(SourceLocation Loc) const; |
| |
| //===--------------------------------------------------------------------===// |
| // Queries about the code at a SourceLocation. |
| //===--------------------------------------------------------------------===// |
| |
| /// getCharacterData - Return a pointer to the start of the specified location |
| /// in the appropriate spelling MemoryBuffer. |
| /// |
| /// \param Invalid If non-NULL, will be set \c true if an error occurs. |
| const char *getCharacterData(SourceLocation SL, bool *Invalid = 0) const; |
| |
| /// getColumnNumber - Return the column # for the specified file position. |
| /// This is significantly cheaper to compute than the line number. This |
| /// returns zero if the column number isn't known. This may only be called |
| /// on a file sloc, so you must choose a spelling or expansion location |
| /// before calling this method. |
| unsigned getColumnNumber(FileID FID, unsigned FilePos, |
| bool *Invalid = 0) const; |
| unsigned getSpellingColumnNumber(SourceLocation Loc, bool *Invalid = 0) const; |
| unsigned getExpansionColumnNumber(SourceLocation Loc, |
| bool *Invalid = 0) const; |
| unsigned getPresumedColumnNumber(SourceLocation Loc, bool *Invalid = 0) const; |
| |
| |
| /// getLineNumber - Given a SourceLocation, return the spelling line number |
| /// for the position indicated. This requires building and caching a table of |
| /// line offsets for the MemoryBuffer, so this is not cheap: use only when |
| /// about to emit a diagnostic. |
| unsigned getLineNumber(FileID FID, unsigned FilePos, bool *Invalid = 0) const; |
| unsigned getSpellingLineNumber(SourceLocation Loc, bool *Invalid = 0) const; |
| unsigned getExpansionLineNumber(SourceLocation Loc, bool *Invalid = 0) const; |
| unsigned getPresumedLineNumber(SourceLocation Loc, bool *Invalid = 0) const; |
| |
| /// Return the filename or buffer identifier of the buffer the location is in. |
| /// Note that this name does not respect #line directives. Use getPresumedLoc |
| /// for normal clients. |
| const char *getBufferName(SourceLocation Loc, bool *Invalid = 0) const; |
| |
| /// getFileCharacteristic - return the file characteristic of the specified |
| /// source location, indicating whether this is a normal file, a system |
| /// header, or an "implicit extern C" system header. |
| /// |
| /// This state can be modified with flags on GNU linemarker directives like: |
| /// # 4 "foo.h" 3 |
| /// which changes all source locations in the current file after that to be |
| /// considered to be from a system header. |
| SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const; |
| |
| /// getPresumedLoc - This method returns the "presumed" location of a |
| /// SourceLocation specifies. A "presumed location" can be modified by #line |
| /// or GNU line marker directives. This provides a view on the data that a |
| /// user should see in diagnostics, for example. |
| /// |
| /// Note that a presumed location is always given as the expansion point of |
| /// an expansion location, not at the spelling location. |
| /// |
| /// \returns The presumed location of the specified SourceLocation. If the |
| /// presumed location cannot be calculate (e.g., because \p Loc is invalid |
| /// or the file containing \p Loc has changed on disk), returns an invalid |
| /// presumed location. |
| PresumedLoc getPresumedLoc(SourceLocation Loc) const; |
| |
| /// isFromSameFile - Returns true if both SourceLocations correspond to |
| /// the same file. |
| bool isFromSameFile(SourceLocation Loc1, SourceLocation Loc2) const { |
| return getFileID(Loc1) == getFileID(Loc2); |
| } |
| |
| /// isFromMainFile - Returns true if the file of provided SourceLocation is |
| /// the main file. |
| bool isFromMainFile(SourceLocation Loc) const { |
| return getFileID(Loc) == getMainFileID(); |
| } |
| |
| /// isInSystemHeader - Returns if a SourceLocation is in a system header. |
| bool isInSystemHeader(SourceLocation Loc) const { |
| return getFileCharacteristic(Loc) != SrcMgr::C_User; |
| } |
| |
| /// isInExternCSystemHeader - Returns if a SourceLocation is in an "extern C" |
| /// system header. |
| bool isInExternCSystemHeader(SourceLocation Loc) const { |
| return getFileCharacteristic(Loc) == SrcMgr::C_ExternCSystem; |
| } |
| |
| /// \brief The size of the SLocEnty that \arg FID represents. |
| unsigned getFileIDSize(FileID FID) const { |
| bool Invalid = false; |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid); |
| if (Invalid) |
| return 0; |
| |
| int ID = FID.ID; |
| unsigned NextOffset; |
| if ((ID > 0 && unsigned(ID+1) == local_sloc_entry_size())) |
| NextOffset = getNextLocalOffset(); |
| else if (ID+1 == -1) |
| NextOffset = MaxLoadedOffset; |
| else |
| NextOffset = getSLocEntry(FileID::get(ID+1)).getOffset(); |
| |
| return NextOffset - Entry.getOffset() - 1; |
| } |
| |
| /// \brief Given a specific FileID, returns true if \arg Loc is inside that |
| /// FileID chunk and sets relative offset (offset of \arg Loc from beginning |
| /// of FileID) to \arg relativeOffset. |
| bool isInFileID(SourceLocation Loc, FileID FID, |
| unsigned *RelativeOffset = 0) const { |
| return isInFileID(Loc, FID, 0, getFileIDSize(FID), RelativeOffset); |
| } |
| |
| /// \brief Given a specific chunk of a FileID (FileID with offset+length), |
| /// returns true if \arg Loc is inside that chunk and sets relative offset |
| /// (offset of \arg Loc from beginning of chunk) to \arg relativeOffset. |
| bool isInFileID(SourceLocation Loc, |
| FileID FID, unsigned offset, unsigned length, |
| unsigned *relativeOffset = 0) const { |
| assert(!FID.isInvalid()); |
| if (Loc.isInvalid()) |
| return false; |
| |
| unsigned FIDOffs = getSLocEntry(FID).getOffset(); |
| unsigned start = FIDOffs + offset; |
| unsigned end = start + length; |
| |
| // Make sure offset/length describe a chunk inside the given FileID. |
| assert(start < FIDOffs + getFileIDSize(FID)); |
| assert(end <= FIDOffs + getFileIDSize(FID)); |
| |
| if (Loc.getOffset() >= start && Loc.getOffset() < end) { |
| if (relativeOffset) |
| *relativeOffset = Loc.getOffset() - start; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Line Table Manipulation Routines |
| //===--------------------------------------------------------------------===// |
| |
| /// getLineTableFilenameID - Return the uniqued ID for the specified filename. |
| /// |
| unsigned getLineTableFilenameID(StringRef Str); |
| |
| /// AddLineNote - Add a line note to the line table for the FileID and offset |
| /// specified by Loc. If FilenameID is -1, it is considered to be |
| /// unspecified. |
| void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID); |
| void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID, |
| bool IsFileEntry, bool IsFileExit, |
| bool IsSystemHeader, bool IsExternCHeader); |
| |
| /// \brief Determine if the source manager has a line table. |
| bool hasLineTable() const { return LineTable != 0; } |
| |
| /// \brief Retrieve the stored line table. |
| LineTableInfo &getLineTable(); |
| |
| //===--------------------------------------------------------------------===// |
| // Queries for performance analysis. |
| //===--------------------------------------------------------------------===// |
| |
| /// Return the total amount of physical memory allocated by the |
| /// ContentCache allocator. |
| size_t getContentCacheSize() const { |
| return ContentCacheAlloc.getTotalMemory(); |
| } |
| |
| struct MemoryBufferSizes { |
| const size_t malloc_bytes; |
| const size_t mmap_bytes; |
| |
| MemoryBufferSizes(size_t malloc_bytes, size_t mmap_bytes) |
| : malloc_bytes(malloc_bytes), mmap_bytes(mmap_bytes) {} |
| }; |
| |
| /// Return the amount of memory used by memory buffers, breaking down |
| /// by heap-backed versus mmap'ed memory. |
| MemoryBufferSizes getMemoryBufferSizes() const; |
| |
| // Return the amount of memory used for various side tables and |
| // data structures in the SourceManager. |
| size_t getDataStructureSizes() const; |
| |
| //===--------------------------------------------------------------------===// |
| // Other miscellaneous methods. |
| //===--------------------------------------------------------------------===// |
| |
| /// \brief Get the source location for the given file:line:col triplet. |
| /// |
| /// If the source file is included multiple times, the source location will |
| /// be based upon the first inclusion. |
| /// |
| /// If the location points inside a function macro argument, the returned |
| /// location will be the macro location in which the argument was expanded. |
| /// \sa getMacroArgExpandedLocation |
| SourceLocation getLocation(const FileEntry *SourceFile, |
| unsigned Line, unsigned Col) { |
| SourceLocation Loc = translateFileLineCol(SourceFile, Line, Col); |
| return getMacroArgExpandedLocation(Loc); |
| } |
| |
| /// \brief Get the source location for the given file:line:col triplet. |
| /// |
| /// If the source file is included multiple times, the source location will |
| /// be based upon the first inclusion. |
| SourceLocation translateFileLineCol(const FileEntry *SourceFile, |
| unsigned Line, unsigned Col); |
| |
| /// \brief If \arg Loc points inside a function macro argument, the returned |
| /// location will be the macro location in which the argument was expanded. |
| /// If a macro argument is used multiple times, the expanded location will |
| /// be at the first expansion of the argument. |
| /// e.g. |
| /// MY_MACRO(foo); |
| /// ^ |
| /// Passing a file location pointing at 'foo', will yield a macro location |
| /// where 'foo' was expanded into. |
| SourceLocation getMacroArgExpandedLocation(SourceLocation Loc); |
| |
| /// \brief Determines the order of 2 source locations in the translation unit. |
| /// |
| /// \returns true if LHS source location comes before RHS, false otherwise. |
| bool isBeforeInTranslationUnit(SourceLocation LHS, SourceLocation RHS) const; |
| |
| /// \brief Determines the order of 2 source locations in the "source location |
| /// address space". |
| bool isBeforeInSourceLocationOffset(SourceLocation LHS, |
| SourceLocation RHS) const { |
| return isBeforeInSourceLocationOffset(LHS, RHS.getOffset()); |
| } |
| |
| /// \brief Determines the order of a source location and a source location |
| /// offset in the "source location address space". |
| /// |
| /// Note that we always consider source locations loaded from |
| bool isBeforeInSourceLocationOffset(SourceLocation LHS, unsigned RHS) const { |
| unsigned LHSOffset = LHS.getOffset(); |
| bool LHSLoaded = LHSOffset >= CurrentLoadedOffset; |
| bool RHSLoaded = RHS >= CurrentLoadedOffset; |
| if (LHSLoaded == RHSLoaded) |
| return LHS.getOffset() < RHS; |
| |
| return LHSLoaded; |
| } |
| |
| // Iterators over FileInfos. |
| typedef llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*> |
| ::const_iterator fileinfo_iterator; |
| fileinfo_iterator fileinfo_begin() const { return FileInfos.begin(); } |
| fileinfo_iterator fileinfo_end() const { return FileInfos.end(); } |
| bool hasFileInfo(const FileEntry *File) const { |
| return FileInfos.find(File) != FileInfos.end(); |
| } |
| |
| /// PrintStats - Print statistics to stderr. |
| /// |
| void PrintStats() const; |
| |
| /// \brief Get the number of local SLocEntries we have. |
| unsigned local_sloc_entry_size() const { return LocalSLocEntryTable.size(); } |
| |
| /// \brief Get a local SLocEntry. This is exposed for indexing. |
| const SrcMgr::SLocEntry &getLocalSLocEntry(unsigned Index, |
| bool *Invalid = 0) const { |
| assert(Index < LocalSLocEntryTable.size() && "Invalid index"); |
| return LocalSLocEntryTable[Index]; |
| } |
| |
| /// \brief Get the number of loaded SLocEntries we have. |
| unsigned loaded_sloc_entry_size() const { return LoadedSLocEntryTable.size();} |
| |
| /// \brief Get a loaded SLocEntry. This is exposed for indexing. |
| const SrcMgr::SLocEntry &getLoadedSLocEntry(unsigned Index, bool *Invalid=0) const { |
| assert(Index < LoadedSLocEntryTable.size() && "Invalid index"); |
| if (!SLocEntryLoaded[Index]) |
| ExternalSLocEntries->ReadSLocEntry(-(static_cast<int>(Index) + 2)); |
| return LoadedSLocEntryTable[Index]; |
| } |
| |
| const SrcMgr::SLocEntry &getSLocEntry(FileID FID, bool *Invalid = 0) const { |
| return getSLocEntryByID(FID.ID); |
| } |
| |
| unsigned getNextLocalOffset() const { return NextLocalOffset; } |
| |
| void setExternalSLocEntrySource(ExternalSLocEntrySource *Source) { |
| assert(LoadedSLocEntryTable.empty() && |
| "Invalidating existing loaded entries"); |
| ExternalSLocEntries = Source; |
| } |
| |
| /// \brief Allocate a number of loaded SLocEntries, which will be actually |
| /// loaded on demand from the external source. |
| /// |
| /// NumSLocEntries will be allocated, which occupy a total of TotalSize space |
| /// in the global source view. The lowest ID and the base offset of the |
| /// entries will be returned. |
| std::pair<int, unsigned> |
| AllocateLoadedSLocEntries(unsigned NumSLocEntries, unsigned TotalSize); |
| |
| private: |
| const llvm::MemoryBuffer *getFakeBufferForRecovery() const; |
| |
| /// \brief Get the entry with the given unwrapped FileID. |
| const SrcMgr::SLocEntry &getSLocEntryByID(int ID) const { |
| assert(ID != -1 && "Using FileID sentinel value"); |
| if (ID < 0) |
| return getLoadedSLocEntryByID(ID); |
| return getLocalSLocEntry(static_cast<unsigned>(ID)); |
| } |
| |
| const SrcMgr::SLocEntry &getLoadedSLocEntryByID(int ID) const { |
| return getLoadedSLocEntry(static_cast<unsigned>(-ID - 2)); |
| } |
| |
| /// createExpansionLoc - Implements the common elements of storing an |
| /// expansion info struct into the SLocEntry table and producing a source |
| /// location that refers to it. |
| SourceLocation createExpansionLocImpl(const SrcMgr::ExpansionInfo &Expansion, |
| unsigned TokLength, |
| int LoadedID = 0, |
| unsigned LoadedOffset = 0); |
| |
| /// isOffsetInFileID - Return true if the specified FileID contains the |
| /// specified SourceLocation offset. This is a very hot method. |
| inline bool isOffsetInFileID(FileID FID, unsigned SLocOffset) const { |
| const SrcMgr::SLocEntry &Entry = getSLocEntry(FID); |
| // If the entry is after the offset, it can't contain it. |
| if (SLocOffset < Entry.getOffset()) return false; |
| |
| // If this is the very last entry then it does. |
| if (FID.ID == -2) |
| return true; |
| |
| // If it is the last local entry, then it does if the location is local. |
| if (static_cast<unsigned>(FID.ID+1) == LocalSLocEntryTable.size()) { |
| return SLocOffset < NextLocalOffset; |
| } |
| |
| // Otherwise, the entry after it has to not include it. This works for both |
| // local and loaded entries. |
| return SLocOffset < getSLocEntry(FileID::get(FID.ID+1)).getOffset(); |
| } |
| |
| /// createFileID - Create a new fileID for the specified ContentCache and |
| /// include position. This works regardless of whether the ContentCache |
| /// corresponds to a file or some other input source. |
| FileID createFileID(const SrcMgr::ContentCache* File, |
| SourceLocation IncludePos, |
| SrcMgr::CharacteristicKind DirCharacter, |
| int LoadedID, unsigned LoadedOffset); |
| |
| const SrcMgr::ContentCache * |
| getOrCreateContentCache(const FileEntry *SourceFile); |
| |
| /// createMemBufferContentCache - Create a new ContentCache for the specified |
| /// memory buffer. |
| const SrcMgr::ContentCache* |
| createMemBufferContentCache(const llvm::MemoryBuffer *Buf); |
| |
| FileID getFileIDSlow(unsigned SLocOffset) const; |
| FileID getFileIDLocal(unsigned SLocOffset) const; |
| FileID getFileIDLoaded(unsigned SLocOffset) const; |
| |
| SourceLocation getExpansionLocSlowCase(SourceLocation Loc) const; |
| SourceLocation getSpellingLocSlowCase(SourceLocation Loc) const; |
| |
| std::pair<FileID, unsigned> |
| getDecomposedExpansionLocSlowCase(const SrcMgr::SLocEntry *E) const; |
| std::pair<FileID, unsigned> |
| getDecomposedSpellingLocSlowCase(const SrcMgr::SLocEntry *E, |
| unsigned Offset) const; |
| void computeMacroArgsCache(SrcMgr::ContentCache *Content, FileID FID); |
| }; |
| |
| |
| } // end namespace clang |
| |
| #endif |